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