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