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