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