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