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