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