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