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