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