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