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