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