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)(19,29)(20,32)(21,26)(22,27)(23,28)(24,31)(25,30)(2,5)(6,8)(9,11)(10,13)(12,15)(14,16)(17,19,22,31,23,32,21,25)(18,24,26,29,28,30,27,20)(1,3,4,7)(2,6,5,8)(11,15)(13,16)(17,20,22,24,23,29,21,30)(18,25,26,19,28,31,27,32)(9,11)(10,13)(12,15)(14,16)(17,18)(19,30)(20,31)(21,27)(22,26)(23,28)(24,32)(25,29) involution — undirected(11,15)(13,16)(17,21,23,22)(18,26,28,27)(19,31,32,25)(20,30,29,24)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.