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