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