One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,6)(7,8)(9,10,13,12)(11,15,16,14)(17,18,22,23)(19,24,27,20)(21,29,30,25)(26,28,32,31)(1,3,6,7)(2,4,5,8)(9,11,13,16)(10,14,12,15)(18,23)(20,24)(25,29)(28,31)(1,2,6,5)(3,8,7,4)(17,19,22,27)(18,20,23,24)(21,26,30,32)(25,28,29,31)(1,4)(2,7)(3,5)(6,8)(17,19)(18,24)(20,23)(21,26)(22,27)(25,31)(28,29)(30,32) involution — undirected(1,4)(2,3)(5,7)(6,8)(9,12,13,10)(11,15,16,14)(17,20,22,24)(18,19,23,27)(21,28,30,31)(25,26,29,32)(1,5,6,2)(3,8,7,4)(17,21,22,30)(18,25,23,29)(19,26,27,32)(20,28,24,31)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.