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)(11,15)(12,13)(14,16)(17,18)(19,25)(20,32)(21,26)(22,27)(23,28)(24,30)(29,31)(1,3,5,4)(2,6,8,7)(9,10)(11,14)(12,13)(15,16)(17,18)(19,29)(20,24)(21,26)(22,27)(23,28)(25,31)(30,32)(10,13)(14,15)(17,19,22,30,23,31,21,20)(18,24,26,25,28,32,27,29)(9,11,12,16)(10,14,13,15)(17,20,21,31,23,30,22,19)(18,25,27,24,28,29,26,32)(1,4,5,3)(2,7,8,6)(17,21,23,22)(18,26,28,27)(19,20,31,30)(24,25,32,29)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.