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