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