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