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)(19,28)(20,24)(21,25)(22,27)(23,31)(26,30)(29,32)(1,3,5,4)(2,6,7,8)(9,10)(11,14)(12,13)(15,16)(19,29)(20,23)(24,31)(28,32)(1,4,5,3)(2,6,7,8)(10,13)(14,16)(17,19,30,24,22,29,21,31)(18,23,25,32,27,20,26,28)(9,11)(10,14)(12,15)(13,16)(17,20)(18,24)(19,26)(21,32)(22,23)(25,29)(27,31)(28,30) involution — undirected(11,15)(14,16)(17,21,22,30)(18,25,27,26)(19,31,29,24)(20,28,23,32)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.