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