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