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