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