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