One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,9)(5,13)(6,10)(8,11)(12,16)(14,15)(17,18,23,27)(19,28,32,42)(20,33,37,25)(21,26,22,38)(24,30,40,31)(29,43,34,48)(35,47,36,41)(39,44,46,45)(1,3)(2,7)(4,11)(5,14)(6,12)(8,9)(10,16)(13,15)(17,19)(18,24)(20,34)(21,31)(22,30)(23,32)(25,39)(26,42)(27,40)(28,38)(29,37)(33,46)(35,44)(36,45)(41,48)(43,47) involution — undirected(1,3)(2,8)(4,11)(5,14)(6,12)(7,13)(9,16)(10,15)(17,20,22,36,23,37,21,35)(18,25,26,41,27,33,38,47)(19,29,31,45,32,34,30,44)(24,39,28,43,40,46,42,48)(1,4,6,5)(2,9,10,13)(3,11,12,14)(7,8,16,15)(17,21,23,22)(18,26,27,38)(19,30,32,31)(20,35,37,36)(24,28,40,42)(25,41,33,47)(29,44,34,45)(39,43,46,48)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.