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