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