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