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