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