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)(17,18,20,25,21,24,28,23)(19,22,27,31,26,30,32,29)(1,3,5,4)(2,6,7,8)(9,10,12,13)(11,14,15,16)(17,19,21,26)(18,22,24,30)(20,27,28,32)(23,29,25,31)(10,13)(14,16)(18,23)(20,28)(22,29)(24,25)(27,32)(30,31) involution — undirected(1,4,5,3)(2,6,7,8)(11,15)(14,16)(19,26)(22,30)(27,32)(29,31)(9,11,12,15)(10,14,13,16)(18,24)(22,30)(23,25)(29,31)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.