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