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