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