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