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