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