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