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