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