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