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