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