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