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