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