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