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