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