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