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