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