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