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