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