One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,8)(3,9,11,6)(4,7,12,14)(10,15,16,13)(17,18,23,27)(19,24,28,30)(20,25,29,32)(21,22,26,31)(33,34,38,41)(35,39,43,48)(36,44,37,40)(42,47,45,46)(1,3,5,11)(2,6,8,9)(4,10,12,16)(7,13,14,15)(19,28)(20,29)(24,30)(25,32)(33,35)(34,39)(36,45)(37,42)(38,43)(40,47)(41,48)(44,46)(1,3)(2,6)(4,10)(5,11)(7,13)(8,9)(12,16)(14,15)(17,19)(18,24)(20,21)(22,25)(23,28)(26,29)(27,30)(31,32)(33,36,38,37)(34,40,41,44)(35,42,43,45)(39,46,48,47)(1,3)(2,6)(4,10)(5,11)(7,13)(8,9)(12,16)(14,15)(17,20)(18,25)(19,21)(22,24)(23,29)(26,28)(27,32)(30,31)(33,35)(34,39)(36,42)(37,45)(38,43)(40,46)(41,48)(44,47) involution — undirected(1,2)(3,6)(4,7)(5,8)(9,11)(10,13)(12,14)(15,16)(17,21)(18,22)(19,20)(23,26)(24,25)(27,31)(28,29)(30,32)(33,34)(35,39)(36,40)(37,44)(38,41)(42,46)(43,48)(45,47) involution — undirected(1,4,5,12)(2,7,8,14)(3,10,11,16)(6,13,9,15)(17,22)(18,26)(19,25)(20,30)(21,27)(23,31)(24,29)(28,32)(33,37,38,36)(34,40,41,44)(35,42,43,45)(39,47,48,46)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.