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