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