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