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