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