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