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