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