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