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