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