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