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