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