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