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