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