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