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