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