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