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