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