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