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