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