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