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