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)(11,13)(12,14)(15,16)(17,18,22,26)(19,27,31,38)(20,32,33,24)(21,35,36,25)(23,29,39,30)(28,42,44,41)(34,40,48,47)(37,43,46,45)(9,10)(11,15)(12,14)(13,16)(17,19,22,31)(18,23,26,39)(20,28,33,44)(21,29,36,30)(24,37,32,46)(25,38,35,27)(34,45,48,43)(40,42,47,41)(2,5)(6,8)(9,11,12,16)(10,13,14,15)(17,20)(18,24)(19,28)(21,34)(22,33)(23,37)(25,40)(26,32)(27,41)(29,45)(30,43)(31,44)(35,47)(36,48)(38,42)(39,46)(11,16)(13,15)(19,29)(20,33)(21,36)(23,38)(24,32)(25,35)(27,39)(28,43)(30,31)(37,41)(42,46)(44,45) involution — undirected(1,3,4,7)(2,6,5,8)(10,14)(13,15)(20,33)(24,32)(28,44)(34,48)(37,46)(40,47)(41,42)(43,45)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.