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