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