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