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)(11,13)(12,14)(15,16)(17,18,21,27,22,19,23,25)(20,26,30,32,28,24,29,31)(1,3)(2,6)(4,7)(5,8)(9,10)(11,15)(12,14)(13,16)(18,19)(20,28)(25,27)(29,30) involution — undirected(1,2,5,4)(3,6,8,7)(9,11)(10,13)(12,16)(14,15)(17,19,22,18)(20,24,28,26)(21,27,23,25)(29,31,30,32)(3,8)(6,7)(11,16)(13,15)(17,20,22,28)(18,24,19,26)(21,30,23,29)(25,32,27,31)(1,4,5,2)(3,7,8,6)(10,14)(13,15)(17,21,22,23)(18,25,19,27)(20,29,28,30)(24,31,26,32)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.