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