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