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