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