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)(11,14)(12,13)(15,16)(17,18,21,20)(19,25,28,23)(22,24,31,30)(26,29,32,27)(2,5)(6,8)(17,19,21,28)(18,23,20,25)(22,27,31,29)(24,32,30,26)(1,3,4,7)(2,6,5,8)(10,13)(14,16)(17,20,21,18)(19,26,28,32)(22,24,31,30)(23,27,25,29)(19,27)(22,31)(23,32)(24,30)(25,26)(28,29) involution — undirected(9,11,12,15)(10,14,13,16)(18,20)(23,25)(24,30)(26,32)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.