One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,6,9,13,11,14,10,7)(8,16,19,12,18,15,17,20)(21,22,24,28,25,29,30,27)(23,26,32,33,31,34,36,35)(2,4)(5,7,10,14,11,13,9,6)(8,12,17,16,18,20,19,15)(21,23,30,36,25,31,24,32)(22,26,27,35,29,34,28,33)(5,8)(6,12)(7,15)(9,17)(10,19)(11,18)(13,16)(14,20)(22,27)(23,31)(24,30)(26,33)(28,29)(34,35) involution — undirected(2,4)(5,9,11,10)(6,13,14,7)(8,17,18,19)(12,16,20,15)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.