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