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