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