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