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