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