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