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