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