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