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