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