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