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