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