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