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