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