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