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