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