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