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