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