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