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