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