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