One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,7)(3,9,11,6)(4,8,13,15)(10,16,12,14)(17,18,23,26)(19,24,27,21)(20,22,25,31)(28,29,32,30)(33,34,38,41)(35,42,37,39)(36,40,45,47)(43,48,44,46)(1,3,5,11)(2,6,7,9)(4,10,13,12)(8,14,15,16)(17,19,23,27)(18,24,26,21)(20,28,25,32)(22,29,31,30)(33,35,38,37)(34,39,41,42)(36,43,45,44)(40,46,47,48)(2,7)(6,9)(8,15)(14,16)(19,27)(21,24)(28,32)(29,30)(33,36,38,45)(34,40,41,47)(35,43,37,44)(39,46,42,48)(1,3)(2,6)(4,12)(5,11)(7,9)(8,16)(10,13)(14,15)(17,20)(18,22)(19,28)(21,30)(23,25)(24,29)(26,31)(27,32)(33,34)(35,39)(36,40)(37,42)(38,41)(43,46)(44,48)(45,47) involution — undirected(1,2)(3,6)(4,8)(5,7)(9,11)(10,14)(12,16)(13,15)(17,21)(18,19)(20,30)(22,28)(23,24)(25,29)(26,27)(31,32)(33,36)(34,40)(35,43)(37,44)(38,45)(39,46)(41,47)(42,48) involution — undirected(1,4,5,13)(2,8,7,15)(3,10,11,12)(6,14,9,16)(17,22)(18,25)(19,29)(20,26)(21,28)(23,31)(24,32)(27,30)(33,37,38,35)(34,39,41,42)(36,44,45,43)(40,46,47,48)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.