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