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