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