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