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