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