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