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