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