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