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