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