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