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