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