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