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)(19,24)(20,32)(21,25)(22,27)(23,28)(26,33)(29,39)(30,40)(31,44)(34,47)(35,41)(36,45)(37,42)(38,43)(46,48) involution — undirected(1,3,5,11)(2,6,7,9)(4,12,13,10)(8,16,15,14)(17,19,23,29)(18,24,28,39)(20,22,31,33)(21,35,38,34)(25,41,43,47)(26,32,27,44)(30,36,46,37)(40,45,48,42)(17,20,33,29,23,31,22,19)(18,24,27,44,28,39,26,32)(21,34,37,46,38,35,36,30)(25,40,45,41,43,48,42,47)(2,7)(6,9)(8,15)(14,16)(19,29)(20,31)(24,39)(30,46)(32,44)(34,35)(40,48)(41,47) involution — undirected(1,4,5,13)(2,8,7,15)(3,10,11,12)(6,14,9,16)(17,21)(18,25)(19,30)(20,34)(22,36)(23,38)(24,40)(26,42)(27,45)(28,43)(29,46)(31,35)(32,47)(33,37)(39,48)(41,44)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.