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