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