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