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