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