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