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