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