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