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