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